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By Zayden R., August 16, 2026
Eric Biggers has released an updated AVX-512 patch for Linux RAID, achieving a 43% performance improvement on an AMD Ryzen 9 9950X. This update could enhance parity block handling on modern CPUs.
Eric Biggers, a Google engineer, recently unveiled an updated AVX-512 optimization patch for Linux RAID, marking a significant improvement in performance on modern CPUs. This revision, tested on an AMD Ryzen 9 9950X, delivers up to a 43% increase in efficiency for the xor_gen() function, which is crucial for generating and checking parity blocks in Linux software RAID and Btrfs' built-in RAID capabilities.
The updated patch addresses earlier issues by including missing VZEROUPPER instructions, enhancing the performance further. This AVX-512 implementation is tailored for newer processors, including AMD's Zen 4 and later, Intel's Xeon Sapphire Rapids and Raptor Lake, with future compatibility expected for Intel's upcoming Nova Lake processors.
While this patch is unlikely to make it into the imminent Linux v7.3 merge window, it represents a promising advancement for those leveraging modern CPU architectures. Engineers working with Linux RAID systems might want to follow this development closely, as the performance gains are substantial. The patch series, now in its fourth iteration, also includes enhancements to the kernel's handling of AVX and AVX-512 feature flags.
Although not yet merged into the mainline, engineers interested in testing or providing feedback can review the v4 patch series. This update is a noteworthy improvement for sysadmins and developers focusing on maximizing throughput and efficiency in high-performance RAID configurations.
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